Main application

This series of low-voltage withdrawable switchgear is a kind of combined cabinet that is assembled by factory (FBA)with standard modules.

This series of low-voltage withdrawable switchgear is applicable to power plants, substations, petrochemical, metallurgical and steel rolling, transportation, energy, light industrial and textile enterprises, residential quarters, high-rise buildings and other places, as the power distribution equipment of the AC 50~60HZ power system with rated working voltage of 660V and below for power conversion, distribution and control.

The installation complies with GB 7251.1 Low-voltage switchgear and controlgear assemblies-Part 1: Type-tested and partially type-tested assemblies and JB/T 9961 Low-voltage withdrawable switchgear and controlgear assemblies and IEC439-1 international professional standards.

Model and meaning

Normal service condition

● The ambient air temperature shall not be higher than +40°C and lower than -5°C , and the average temperature shall not be higher than +35°C within 24 hours.

● Atmospheric conditions: The air is clean and the relative humidity does not exceed 50% at the maximum temperature of +40°C. Higher relative humidity is allowed at lower temperatures, e.g. 90% at +20°C, but temperature changes should be taken into account as condensation may occur occasionally.

● Altitude: not exceeding 2000m.

● The device is suitable for transport and storage processes at temperatures ranging from -25°C to +55°C and up to +70°C for a short period of time (not exceeding 24h). The device should not suffer any irreversible damage at these limited temperatures and should be able to operate normally under normal conditions.

● If the above service conditions cannot be met, it shall be settled through negotiation between the user and the manufacturer.

● When the device is used on offshore oil drilling platform and nuclear power plant, a separate technical agreement shall be signed.

Basic technical parameter

1. Electric performance		660V(1000)V
Rated insulation voltage		380V、660V
Rated operating voltage		5000A
Max. operating current of main bus		100kA/1s
Rated withstand current of main bus		220kA/1s
Rated peak withstand current of main bus		1000A
Max. operating current of distribution bus (vertical bus)
Peak current of distribution bus (vertical bus)
	Standard type	105kA (max.) /0.1s
	Reinforced type	176kA (max.) /0.1s

2. Protection level
Standard	In line with IEC 529 and DIN 40050 standards
IP30	Fixed protection for size greater than Φ 2.5 MM
IP40	Fixed protection for size greater than 1.0 MM Φ
IP54	protection against dust and any direction of spatter
Note	Please consult with the manufacturer when ordering IP54 protection level

Switch cabinet type

1. Power distribution center cabinet (PC): it can use EMAX, MT, 3WN, AH, ME series circuit breaker.

2. Motor control center cabinet (MCC): it is assembled by drawers of different sizes. The main switch of each circuit adopts high-grade broken plastic case circuit breaker or rotating load switch with fuse.Power factor automatic compensation cabinet (with manual, automatic and remote power factor compensation device)

Cabinet body schematic diagram

A power distribution center (PC) cabinet

Height	Width	Depth
H	B	T	T1	T2	Note
2200	400	1000	800	200	Main bus transfer
2200	400	1000	800	200	Fₛ-1250-2000 ME630-1605
2200	600	1000	800	200	F₂ₛ-2500
2200	800	1000	800	200	F₄ₛ-3200 me2000-3200
2200	1000	1000	800	200	F₅ₛ-4000 Me3205
2200	1200	1000	800	200	Me4005